package com.itheima.reggie.controller;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;
import com.itheima.reggie.dto.resp.R;
import com.itheima.reggie.util.AliOssUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.util.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {
    //映射yml中的路径
    @Value("${reggie.path}")
    private String basePath;

    @Autowired
    private AliOssUtils aliOssUtils;

    /**
     * 文件上传
     *
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R upload(MultipartFile file) throws IOException {

//file是一个临时文件,需要转存到指定位置,否则本次请求完成后临时文件会删除
        log.info(file.toString());
        //定义一个原始文件名
        String originFileName = file.getOriginalFilename();
        log.info("originFileName:{}", originFileName);
        //获取后缀名
        String suffix = originFileName.substring(originFileName.lastIndexOf("."));
        log.info("suffix:{}", suffix);
        //UUID随机生成文件名,防止重名
        String fileName = UUID.randomUUID().toString() + suffix;
        log.info("fileName:{}", fileName);

      /*  //创建一个目录对象
        File dir = new File(basePath);
        //判断目录是否存在
        if (!dir.exists()) {
            //不存在的情况下,需要创建
            dir.mkdirs();
        }
        try {
            //将临时文件转存到指定位置
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }*/
        aliOssUtils.upload(fileName, file.getInputStream());
        return R.success(fileName);

    }

    /**
     * 文件下载
     *
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {

        /*try {
            //输入流，通过输入流读取文件内容
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));

            //输出流，通过输出流将文件写回浏览器
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("reggie-img/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            //关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }*/
        // IOUtils.copy(new FileInputStream(basePath + name), response.getOutputStream());
        aliOssUtils.download(name, response.getOutputStream());
    }
}
